Parks Optical Telescopes是最好的反射镜吗
NEWTONIAN MODE
. Q* r& [7 \% S1 s ewww.astroview.com.cn国内专业的天文望远镜器材评测和交流论坛，致力于如高桥、televue、tmb、ap、tec等顶级望远镜和附属器材' s4 t4 G4 ^2 t+ P9 n$ o" j
The ultra fast, rich-field (f/4) reflector mode combines large aperture and a wide field of view to deliver breathtaking views of globular clusters, open clusters, nebulae and galaxies. This mode is perfect for deep sky visual and photographic applications. Astro-photographers will appreciate the extremely fast photographic performance the f/4 design delivers.
: ~+ x- b/ j& |) f' T8 H天文家园欢迎您！ h2 G% B2 l8 `, ]
CASSEGRAIN MODE 天文望远镜器材评测和交流论坛, h2 \* ~, ^' W) t2 U
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The long focal length (f/12) classical Cassegrain mode is ideal for high magnification, high-resolution observing and photography. The Cassegrain mode delivers stunning planetary, lunar, solar and double-star images. 天文家园欢迎您！5 }- ?7 J, E0 x* H% X
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MODE SWITCHING 国内专业的天文望远镜器材评测和交流论坛，致力于如高桥、televue、tmb、ap、tec等顶级望远镜和附属器材$ }+ x- ^* p8 E- _6 P" f2 C
; G7 o1 x2 j7 c9 K天文家园欢迎您！Parks HIT Observatory systems are supplied with two secondary mirrors, 180° apart, on a rotating turret. Detents lock either mirror into alignment for desired mode. This switch can be performed in just minutes, without the need for re-collimation. 天文家园欢迎您！7 [$ H( r9 W% G3 h
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GENERAL 国内专业的天文望远镜器材评测和交流论坛，致力于如高桥、televue、tmb、ap、tec等顶级望远镜和附属器材) \ j; J8 J3 D6 X+ c
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All mirrors are ground, polished, and hand figured completely in-house for diffraction-limited results. The optics are mounted in a genuine Parks low thermal conductive fiberglass tube. The tube provides room around the mirror for air movement without disturbing the images. A large 8x50 right angle/straight-through finderscope is standard, as is a 2" rack and pinion focuser with 1.25" adapter. The primary mirror cell and secondary mirror holder are adjustable for alignment purposes. The rotating ring system allows convenient re-positioning of the eyepiece or camera, depending on the location of the target.
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, `1 s' v& n5 ^8 C: `; @6 rNew state-of-the-art, low voltage 12 VDC clock drive/drive corrector runs anywhere in the world without changing the motors or circuitry. Using less than .5 amps at 12 volts, the dual-axis drive corrector can be selected to run at lunar, solar or sidereal rates. Declination motor, declination reversing switch, and dual-axis hand control unit are included.
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Also new is a spring loaded, quick release, anti-backlash declination tangent system with manual and electronic slow-motion tracking capabilities. The worm and gear are both lapped to increase accuracy, and are individually matched. A spring-loaded worm gear assembly assures 100% interfacing of the gears for superior accuracy.
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1 _8 r1 }* t4 G0 V* [www.astroview.com.cnPrimary Mirror Diameter: 12.5"/315mm
) R9 u! k3 Q0 a( ?0 z6 s天文家园欢迎您！Focal Length, Newtonian Mode: 50"/1.3mm % L" e! |$ h5 n
Focal Length, Cassegrain Mode: 150"/3.8m
+ K! \6 ~/ Q8 t5 VFocal ratio: f/4 Newtonian; f/12 Cassegrain
2 F$ G! q, Q" p国内专业的天文望远镜器材评测和交流论坛，致力于如高桥、televue、tmb、ap、tec等顶级望远镜和附属器材f/4 Secondary mirror: 4"/102mm
" N, T0 c, g# N, Y9 L3 if/12 Secondary mirror: 3.5"/89mm - c% h' @( q- j+ i# Q; o4 V: Z
, v" R( V7 s! }# r# ]0 M' ?Focuser: 2" with 1.25" adapter; 3" of travel
/ I7 o1 I/ H3 z' T* W$ i天文望远镜器材评测和交流论坛Finderscope: 8x50 finderscope
+ k' b' D; L: F- u天文家园欢迎您！Tube OD: 16.3"/42cmm
7 J4 ^) l/ p( yTube length: 50"/1.3m
5 s6 G* J4 g; L+ D( `: ^+ P6 ]国内专业的天文望远镜器材评测和交流论坛，致力于如高桥、televue、tmb、ap、tec等顶级望远镜和附属器材Shipping Weights
/ m% Y. `) G! X, P6 H- u5 }7 ^www.astroview.com.cnOTA: 85 lb/40 kg
; u# q' u$ q+ g, c% a8 R) f# y- ?天文论坛,天文,望远镜,天文望远镜,apo,ed,televue,tv,tmb,高桥,ap,tec,望远镜评测，望远镜测评,双筒望远镜，天顶，目镜，望远镜配件，赤道仪Counterweight: 60 lb/27 kg 天文望远镜器材评测和交流论坛( S& w% t, d; L+ J7 m
Mount: 125 lb/57 kg
